CN219717105U

CN219717105U - Battery pack

Info

Publication number: CN219717105U
Application number: CN202321028046.5U
Authority: CN
Inventors: 张均
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-09-19
Anticipated expiration: 2033-04-28

Abstract

The utility model provides a battery pack, which comprises a box body, a tray, a battery cell group and a plurality of supporting components, wherein the tray, the battery cell group and the plurality of supporting components are arranged in the box body; according to the utility model, the plurality of support assemblies are arranged between the tray and the bottom guard plate, each support assembly is fixedly connected with the tray and/or the bottom guard plate, and the support assemblies can support the tray, so that the bearing strength of the tray is improved, the tray can be kept flat under the action of gravity of the battery cell group without serious deformation, and the technical problem that the battery cell group is seriously influenced by the deformation of the tray in the related art is solved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the related art, a tray is arranged in a box body of a battery pack to bear a battery cell assembly, and a plurality of holes are needed to be arranged on the tray for releasing pressure for a battery cell with a valve opened at the bottom end. However, the bearing strength of the tray is weakened due to the arrangement of the holes, so that the tray is seriously deformed due to the gravity action of the battery cell assembly when the battery cell assembly is installed, and the battery cell assembly is further affected to be grouped.

Disclosure of Invention

The embodiment of the utility model provides a battery pack, which can solve the technical problem that the deformation of a tray seriously affects the grouping of battery cell components in the related art.

Embodiments of the present utility model provide a battery pack including:

the box body comprises a frame and a bottom guard board, wherein the bottom guard board is arranged below the frame and is connected with the frame;

the tray is arranged in the box body, the tray is arranged opposite to the bottom guard plate and is connected with the frame, a pressure release cavity is formed by enclosing the tray, the frame and the bottom guard plate, a plurality of pressure release holes are formed in the tray, and the pressure release holes are communicated with the pressure release cavity;

the battery cell group is arranged in the box body and is arranged on the tray; and

the support assemblies are arranged in the pressure relief cavity, and each support assembly is fixedly connected with the tray and/or the bottom guard plate.

In one embodiment, each of the support assemblies includes a support member and a cushioning member disposed on a side of the support member adjacent to the tray.

In one embodiment, the support member is secured to the backplate and the cushioning member is secured to the support member.

In one embodiment, the side of the bottom guard plate facing the tray is provided with a plurality of raised structures, and the support is formed by the raised structures.

In one embodiment, the cushioning member comprises a silicone foam.

In one embodiment, the thickness of the cushioning element ranges from 0.4 mm to 0.7 mm.

In an embodiment, the battery pack further comprises a protection plate, the protection plate is arranged in the pressure relief cavity and connected with the frame, the protection plate is provided with an avoidance hole at a position corresponding to the support assembly, and the support assembly penetrates through the avoidance hole.

In one embodiment, the protective plate comprises a mica plate.

In an embodiment, each adjacent three pressure relief holes form a triangle, the three pressure relief holes respectively correspond to three vertexes of the triangle, and the support component corresponds to a middle area of the triangle.

In an embodiment, the battery cell group includes a plurality of battery cells, and each battery cell corresponds to one of the pressure release holes.

The embodiment of the utility model has the beneficial effects that:

in the embodiment of the utility model, the plurality of support assemblies are arranged between the tray and the bottom guard plate, each support assembly is fixedly connected with the tray and/or the bottom guard plate, and the support assemblies can support the tray, so that the bearing strength of the tray is improved, the tray can be kept flat under the action of gravity of the battery cell group without serious deformation, and the technical problem that the battery cell group is seriously influenced by the deformation of the tray in the related art is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic top view of a case according to an embodiment of the present utility model;

fig. 3 is a schematic cross-sectional view of fig. 2 taken along the direction A-A'.

Fig. 4 is an enlarged schematic view of the structure at B in fig. 3.

Reference numerals illustrate:

100. a battery pack;

10. a case; 11. a frame; 12. a bottom guard board; 101. a pressure relief cavity; 111. a front beam;

112. a rear beam; 113. a side beam; 114. a cross beam;

20. a tray; 21. a boss; 201. a pressure relief hole;

30. a cell group;

40. a support assembly; 41. a support; 42. a buffer member;

50. a protective plate; 501. avoiding the hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Referring to fig. 1 to 4, fig. 1 is a schematic view illustrating an exploded structure of a battery pack according to an embodiment of the present utility model, fig. 2 is a schematic view illustrating a top view of a case according to an embodiment of the present utility model, fig. 3 is a schematic view illustrating a cross-sectional structure along A-A' direction in fig. 2, and fig. 4 is an enlarged schematic view illustrating a structure at B in fig. 3. The battery pack 100 includes a case 10, and a tray 20, a battery cell pack 30, and a plurality of support members 40 disposed in the case 10. The box 10 comprises a frame 11 and a bottom guard plate 12, wherein the bottom guard plate 12 is arranged below the frame 11, and the bottom guard plate 12 is connected with the frame 11.

The tray 20 is arranged in the box 10, the tray 20 and the bottom guard plate 12 are oppositely arranged and connected with the frame 11, a pressure release cavity 101 is formed by enclosing the frame 11 and the bottom guard plate 12, a plurality of pressure release holes 201 are formed in the tray 20, and the pressure release holes 201 are communicated with the pressure release cavity 101. The battery cell group 30 is disposed in the case 10 and is mounted on the tray 20. The plurality of support assemblies 40 are disposed in the pressure relief chamber 101, and each support assembly 40 is fixedly connected to the tray 20 and/or the bottom guard plate 12.

In this embodiment, by disposing a plurality of supporting assemblies 40 between the tray 20 and the bottom guard plate 12, each supporting assembly 40 is fixedly connected with the tray 20 and/or the bottom guard plate 12, the supporting assemblies 40 can support the tray 20, so as to improve the bearing strength of the tray 20, so that the tray 20 can be kept flat under the action of gravity of the battery cell group 30 without serious deformation, and the technical problem that the deformation of the tray 20 seriously affects the grouping of the battery cell group 30 in the related art is improved.

Specifically, referring to fig. 1, the frame 11 includes a front beam 111 and a rear beam 112 disposed opposite to each other, and two side members 113 connected to the front beam 111 and the rear beam 112. The two side members 113 are also disposed opposite to each other. The front beam 111, the side beams 113, and the rear beam 112 are connected in this order to form the frame 11. The rim 11 surrounds the backplate 12 to form a receiving cavity.

Optionally, the frame 11 is made of an aluminum profile, and the bottom guard plate 12 is made of a steel material with a relatively high hardness. The front beam 111, the rear beam 112, and the side beams 113 of the side frame 11 may be connected by welding, caulking, or the like. Of course, the connection between the frame 11 and the bottom guard plate 12 may be fixed by welding or riveting.

The tray 20, the battery cell group 30 and the supporting component 40 are all located in the accommodating cavity. The battery cell group 30 is formed by adopting CTP (CELL TO PACK) groups. The CTP grouping technology directly connects a large number of cylindrical cells in series-parallel by omitting the module, so as to reduce the use of parts, optimize the space utilization, reduce the weight of the battery pack 100, and improve the energy density of the battery pack 100. The assembling process of the CTP grouping technology includes firstly arranging cylindrical electric cells in groups outside the case 10 to form the electric cell group 30, and then loading the electric cell group 30 on the tray 20 in the case 10 to form the battery pack 100.

Referring to fig. 2, the frame 11 further includes a cross member 114 positioned in the case 10, and the cross member 114 is connected to the front beam 111 and the rear beam 112. The cross member 114 divides the interior of the case 10 into a plurality of areas, and the tray 20 is located in one of the areas, such as the area surrounded by the cross member 114, the front beam 111, the rear beam 112, and one of the side beams 113. The area surrounded by the cross member 114, the front beam 111, the rear beam 112, and the other side member 113 is used for placing the electrical part of the battery pack 100.

It is understood that the battery cell assembly 30 is mounted on the tray 20, and the setting area of the tray 20 is the mounting area of the battery cell assembly 30. The housing 10 of the present utility model is not limited to a region for installing the battery cell group 30, for example, the frame 11 of the present utility model may further include a plurality of beams 114, and the plurality of beams 114 divide the space in the housing 10 into a plurality of regions, so that more trays 20 may be installed in the housing 10, and further more battery cell groups 30 may be integrated.

The tray 20 is provided with a plurality of pressure relief holes 201, the battery cell group 30 comprises a plurality of battery cells, each battery cell in the battery cell group 30 corresponds to one pressure relief hole 201, so that high-temperature substances are conveniently sprayed out of the pressure relief holes 201 when the battery cells are out of control, the air pressure in the battery cells is eliminated, and the explosion of the battery cells is avoided.

Specifically, referring to fig. 2 and 3, the pressure relief holes 201 are arranged in rows at intervals in a direction parallel to the extending direction of the cross member 114, and the extending direction of the cross member 114 refers to the extending direction of the cross member 114 from the front beam 111 to the rear beam 112, or refers to the extending direction of the cross member 114 from the rear beam 112 to the front beam 111. In two adjacent rows of the pressure relief holes 201, any two adjacent pressure relief holes 201 are staggered, so that every adjacent three pressure relief holes 201 enclose a triangle, and the three pressure relief holes 201 respectively correspond to three vertexes of the triangle. Among the adjacent three pressure relief holes 201, one pressure relief hole 201 is located in one row, the other two pressure relief holes 201 are located in the other row, and the center line of the two pressure relief holes 201 located in the other row passes through one pressure relief hole 201 located in one row.

Each of the relief holes 201 communicates with the relief chamber 101. The frame 11 is provided with a pressure relief outlet corresponding to the pressure relief cavity 101, for example, the front beam 111 and the rear beam 112 are both provided with pressure relief outlets corresponding to the pressure relief cavity 101. The front beam 111, the rear beam 112 and the side beam 113 are hollow structures to form a pressure relief channel, the pressure relief cavity 101 is communicated with the pressure relief channel through the pressure relief outlet, and the pressure gas in the pressure relief cavity 101 can be discharged through the pressure relief.

Further, the tray 20 is further provided with two bosses 21, and the number of the bosses 21 is two. Two bosses 21 are located on opposite sides of the tray 20, such as one boss 21 being located on a side of the tray 20 adjacent to the front beam 111 and the other boss 21 being located on a side of the tray 20 adjacent to the rear beam 112.

Referring to fig. 1 and 4, the support assembly 40 is positioned between the tray 20 and the bottom shield 12, i.e., the support assembly 40 is disposed within the pressure relief chamber 101. Each of the support assemblies 40 includes a support 41 and a buffer 42, and the buffer 42 is disposed at a side of the support 41 adjacent to the tray 20. The supporting member 41 is mainly used for supporting the tray 20, so as to avoid serious deformation of the tray 20 when the tray is subjected to the gravity action of the battery cell group 30. The buffer member 42 is mainly used for buffering the impact of the tray 20 on the support member 41, so as to avoid abnormal sound generated by the impact between the tray 20 and the support member 41.

In one embodiment, the support 41 is secured to the backplate 12 and the bumper 42 is secured to the support 41. Optionally, the bottom guard plate 12 is provided with a plurality of protruding structures on a side facing the tray 20, and the supporting member 41 is formed by the protruding structures, that is, the supporting member 41 and the bottom guard plate 12 are integrally formed, so that the bonding strength between the supporting member 41 and the bottom guard plate 12 can be improved, and the stability of fixing the supporting member 41 can be improved. The cushioning member 42 comprises a silicone foam. The thickness of the cushioning members 42 may range from 0.4 mm to 0.7 mm, such as 0.5 mm, 0.6 mm, etc. of the cushioning members 42. When the thickness of the buffer member 42 is too thin, the buffer member 12 may impact the beating of the bottom guard plate 12 to the tray 20 to generate abnormal sound, when the thickness of the buffer member 42 is too thick, the bottom guard plate 12 may jack up the tray 20, affect the surface flatness of the tray 20, and finally affect the grouping of the battery cells 30, and the thickness of the buffer member 42 is controlled between 0.4 mm and 0.7 mm in the embodiment of the utility model.

Further, the supporting component 40 is disposed corresponding to an area of the tray 20 where the pressure relief holes 201 are not disposed, for example, every adjacent three pressure relief holes 201 enclose a triangle, the three pressure relief holes 201 respectively correspond to three vertices of the triangle, and the supporting component 40 corresponds to a middle area of the triangle, so as to improve the supporting strength of the tray 20.

It should be noted that, in the present embodiment, the supporting member 41 is fixed on the base plate, and the buffer member 42 is fixed on the supporting member 41, but the present utility model is not limited thereto, for example, in other embodiments, the supporting member 41 may be fixed on the tray 20, the buffer member 42 is fixed on the bottom guard plate 12, and the buffer member 42 is disposed opposite to the supporting member 41; alternatively, the supporting member 41 may be fixed to the bottom guard plate 12 by a welding process or the like, the buffer member 42 may be fixed to the tray 20, and the buffer member 42 may be disposed opposite to the supporting member 41.

Optionally, the battery pack 100 further includes a protection plate 50, where the protection plate 50 is disposed in the pressure relief cavity 101 and connected to the frame 11, and the protection plate 50 is not in contact with the tray 20 and the bottom protection plate 12. The protection plate 50 is provided with a relief hole 501 at a position corresponding to the support assembly 40, and the support assembly 40 passes through the relief hole 501. The inner diameter of the avoidance hole 501 is larger than the outer diameter of the support assembly 40, so that a gap is formed between the part of the support assembly 40 in the avoidance hole 501 and the protection plate 50, so as to avoid interference of the protection plate 50 on the support assembly 40.

Optionally, the protective plate 50 includes a mica plate or the like. The protection plate 50 is used for protecting the bottom protection plate 12, so that high-temperature gas can be prevented from impacting the bottom protection plate 12 to prevent the bottom protection plate 12 from being broken down when the battery cell group 30 is out of control.

Of course, to further avoid the bottom guard plate 12 from being broken down, the bottom guard plate 12 may be made of steel plate, and the steel material has a high melting point and high mechanical strength, so that the bottom guard plate is not easy to break down in a high-temperature state. Alternatively, the thickness of the steel plate may be set to 1 mm to 2 mm.

As can be seen from the above embodiments:

in the battery pack provided by the embodiment of the utility model, the battery pack comprises a box body, a tray, a battery cell group and a plurality of support components, wherein the tray, the battery cell group and the plurality of support components are arranged in the box body; according to the utility model, the plurality of support assemblies are arranged between the tray and the bottom guard plate, each support assembly is fixedly connected with the tray and/or the bottom guard plate, and the support assemblies can support the tray, so that the bearing strength of the tray is improved, the tray can be kept flat under the action of gravity of the battery cell group without serious deformation, and the technical problem that the battery cell group is seriously influenced by the deformation of the tray in the related art is solved.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A battery pack, comprising:

2. The battery pack of claim 1, wherein each of the support assemblies includes a support member and a buffer member disposed on a side of the support member adjacent to the tray.

3. The battery pack of claim 2, wherein the support member is fixed to the bottom guard plate and the buffer member is fixed to the support member.

4. A battery pack according to claim 3, wherein the bottom guard plate is provided with a plurality of protruding structures on a side facing the tray, and the support is formed of the protruding structures.

5. The battery pack of claim 2, wherein the cushioning member comprises a silicone foam.

6. The battery pack of claim 5, wherein the cushioning member has a thickness in the range of 0.4 mm to 0.7 mm.

7. The battery pack of any one of claims 1 to 6, further comprising a protective plate disposed within the pressure relief cavity and connected to the frame, the protective plate having an escape aperture at a location corresponding to the support assembly, the support assembly passing through the escape aperture.

8. The battery pack of claim 7, wherein the protective plate comprises a mica plate.

9. The battery pack according to any one of claims 1 to 6, wherein each adjacent three of the pressure release holes enclose a triangle, the three pressure release holes respectively correspond to three vertices of the triangle, and the support member corresponds to a middle region of the triangle.

10. The battery pack of any one of claims 1 to 6, wherein the cell group includes a plurality of cells, each cell corresponding to one of the pressure relief holes.